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Sipos Csaba dchardware at gmail.comHi, I wonder if anybody was ever able to start a Nokia UltraSite with OpenBSC? In a nut shell: OML link is up and running, TRX1 is successfully loaded software, configured, and now it is stuck in "Waiting for LAPD..." state. The problem is that OpenBSC initiates the RSLSIG link for this TRX, but it seems the BTS is never answering to that: Sat Jun 28 14:33:27 2014 <0018> input/lapd.c:159 LAPD state change on TEI 1: NONE -> ASSIGNED Sat Jun 28 14:33:27 2014 <0018> input/lapd.c:212 LAPD Allocating SAP for SAPI=0 / TEI=1 Sat Jun 28 14:33:27 2014 <0018> input/lapd.c:223 k=2 N200=3 N201=260 T200=1.0 T203=10.0 Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:288 Init DL layer: sequence range = 128, k = 2, history range = 4 Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:227 new state LAPD_STATE_NULL -> LAPD_STATE_IDLE Sat Jun 28 14:33:27 2014 <0018> input/lapd.c:485 LAPD DL-ESTABLISH request TEI=1 SAPI=0 Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:2180 Message DL-ESTABLISH-REQUEST received in state LAPD_STATE_IDLE Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:1694 perform normal establishm. (SABM) Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:227 new state LAPD_STATE_IDLE -> LAPD_STATE_SABM_SENT Sat Jun 28 14:33:27 2014 <0018> input/lapd.c:600 TX: 02 03 7f Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:196 start T200 Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:1779 lapd_send_i() called from line 1609 Sat Jun 28 14:33:27 2014 <0018> lapd_core.c:1618 we are not busy and have no pending data, send RR Sat Jun 28 14:33:27 2014 <0018> input/lapd.c:600 TX: f8 03 01 08 Sat Jun 28 14:33:28 2014 <0018> lapd_core.c:545 Timeout T200 (0x993ad40) state=5 Sat Jun 28 14:33:28 2014 <0018> input/lapd.c:600 TX: 02 03 7f Sat Jun 28 14:33:28 2014 <0018> lapd_core.c:196 start T200 Sat Jun 28 14:33:29 2014 <0018> lapd_core.c:545 Timeout T200 (0x993ad40) state=5 Sat Jun 28 14:33:29 2014 <0018> input/lapd.c:600 TX: 02 03 7f Sat Jun 28 14:33:29 2014 <0018> lapd_core.c:196 start T200 Sat Jun 28 14:33:30 2014 <0018> lapd_core.c:545 Timeout T200 (0x993ad40) state=5 Sat Jun 28 14:33:30 2014 <0018> input/lapd.c:600 TX: 02 03 7f Sat Jun 28 14:33:30 2014 <0018> lapd_core.c:196 start T200 Sat Jun 28 14:33:31 2014 <0018> lapd_core.c:545 Timeout T200 (0x993ad40) state=5 Sat Jun 28 14:33:31 2014 <0018> input/lapd.c:628 LAPD DL-RELEASE indication TEI=1 SAPI=0 Sat Jun 28 14:33:31 2014 <0018> lapd_core.c:303 Resetting LAPDm instance Sat Jun 28 14:33:31 2014 <0018> lapd_core.c:227 new state LAPD_STATE_SABM_SENT -> LAPD_STATE_IDLE Sat Jun 28 14:33:31 2014 <001b> bsc_init.c:318 Lost some E1 TEI link: 2 0x991b8f0 Sat Jun 28 14:33:31 2014 <0018> lapd_core.c:378 sending MDL-ERROR-IND cause 1 Sat Jun 28 14:33:31 2014 <0018> lapd_core.c:227 new state LAPD_STATE_IDLE -> LAPD_STATE_IDLE I set the correct E1 TS for TRX1 RSLSIG in Traffic manager, and double checked the RSLSIG config parameters on both end (OpenBSC config file and the BTS manager). Nokia Insite and MetroSite uses RSL TEI = 1 for the first TRX. Maybe Ultra uses other TEI number for the first TRX, this is something I will try, but otherwise I don't know how it is possible that not even the LAPD connection is being established... Any help is appreciated. Thanks, Csaba